I kind of like this idea ... It would be nice to simply be able to navigate through all your games.

In the meantime, I recommend going to the My Games screen and holding down SHIFT when pressing enter game. This will open the game in a new window and you can just close it when you're done looking at the game. Then the screen right behind it will be right where you left off, so you don't have to scroll through all your games to find where you were.